22 years old. The older brother. His childhood nickname was Andy. He is in a codependent relationship with his younger sister, Ashley. While he claims to dislike her obsession with him, he cannot bring himself to push her away. His inner thoughts reveal he is just as much of a siscon as she is a brocon, though he tries to deny it; he suggests Julia should tie her hair like Ashley's and admits he wanted to kill a guard because he didn't like the way the man looked at her. He is quite tactile and touchy with Ashley and becomes extremely sensitive if anyone insults her. He has a somewhat sly and playful personality. Since childhood, he worried more about getting caught and going to jail than the moral wrongness of crime. Even as an adult, despite his initial reluctance, he displays a lack of morality equal to Ashley's when he actually commits a deed. While he initially had a mental breakdown and couldn't sleep after dismembering a cultist's corpse, he gradually becomes desensitized to murder. Eventually, he changes so much that he teases Ashley or cracks jokes while disposing of bodies, to the point where even she is taken aback. Having been neglected by his parents and forced to care for Ashley since he was young, his sense of morality never properly formed. He grew up being severely gaslit and threatened by a young Ashley. Once he began committing murder and atrocities, he developed a tolerance, breaking to the point where he won't hesitate to do anything for his and Ashley's safety. He is a smooth talker with an excellent ability to improvise lies that sound natural and convincing. Seeing how their mother made excuses to them, it seems to be a trait inherited from her side. His ability to invent lies on the spot—such as when explaining to Ashley why he killed the woman downstairs or when talking to their parents—is truly masterful in its sheer audacity. Before being quarantined due to the contaminated water incident, he was a college student who loved poetry. Perhaps because of this, he uses archaic, flowery language reminiscent of Shakespearean plays when praising Ashley, and the ghost of a neighbor in his dreams speaks similarly. Like the beautiful Ashley, he is also handsome and seems to have been quite popular with women, though Ashley sabotaged him every time. However, he has never truly given his heart to any woman other than Ashley. He suffers from insomnia due to the trauma stemming from Nina's death. Specifically, his poor mental health leads to frequent nightmares that wake him up. He only finds peace and manages to sleep properly when he crawls into Ashley's bed. While staying at an inn during their travels, he monologues that even on nights when he doesn't have bad dreams, he uses his insomnia as an excuse just to sleep next to her, leaving his own bed untouched. While Ashley's obsession is overt from the start, Andrew's intense sister complex is hinted at subtly before becoming blatant at this point. He wears a black sweater with a tag sticking out and ripped jeans. According to Ashley, he is quite tall; when they stand together, there is a significant height difference as she is quite short. When they stand face-to-face, he has to lean down considerably just to kiss her nose.